Valve-stem lubricator



Jan. 17, 1928 J. BROOKS rALvE STEM LUBRICATOH "b le-d March 18, 1927 Patented Jan. 17, 1928.-

UNITED STATES oses PATENT OFFlCE.

JOSEPH BROOKS, OF TORONTO, ONTARIO, CANADA, ASSIGNOR TO THE LUDLOW VALVE MANUFACTURING COMPANY, 01 TROY, NEW YORK, A CORPORATION OF NEW YORK.

vaivn-srnm- LUBnIcAron.

Application filed March 18, 1927. Serial No. 176,518

15 Fig. 2 is a similar view illustrating the manner in which the lubricator is operated by means of a grease-gun or oil-gun.

Referring to the drawings wherein the invention is shown in preferredform, 1 is m a broken-away ortion of a valve case, and 2, is the cap t erefor secured to the case by bolts, 3.

The valve may be of any known form operated by a valve-stem which pro'ects I5 through the cap and the capped end the valve case, and is mounted therein with freedom for rotation while being. held from,

lon itudinal movement by means of a perip eral flange on the stem confined within I a flan e-chamber formed between the ca and va ve case. 7

I have shown a rotatory valve-stem, 4, passing through apertures 1n the valve case and the ca 2, and held from longitudinal movement y means of a peripheral flange,

5, on the stem confined within a flange-chamber, 6, formed in the valve case and closed by the cap, 2.

The flange, 5, engages the inner end wall 10 of the chamber, 6, to revent inward longitudinal movement oft e stem, and the inner end of the cap, 2, to revent outward longitudinal movement 0' the stem.

The cap is formed with a stufiing box, 7,

L5 adapted to receive packing, 8, which is compressed adjustably mounted upon the cap by means of bolts, 10.

The outer end of the valve-stem, 4, ma

by means of a gland or follower, 9,

from time to time lubricate the flanged portion of the valve-stem and the packing in the stufiing-box to facilitate the rotation of the stem, and to prevent deterioration of the packing such as to cause leakage.

In carrying'out my invention, I mount upon the valve-case, 1, a lubricator including a tubular casing, 12, screwed into an aperture in the valve case in communication with the flange-chamber, 6, and an a ertured screw-cap, 13, for the outer en of said casing, 12.

The interior of the screw-cap, '13, forms a valve-chamber for a ball valve, 14, which engages a valve seat, 16, on the interior of the cap to close the. aperture, 15, therethroug The ball valve is yieldingly held against the seat, 16, by means of a coil spring, 17, forming a'check valve which opens inwardly under external pressure, and automatically closes under the influence of the spring, 17, when the pressure is discontinued.

The outer end of the cap, 13, is in the form of a nipple, 18, adapted to receive the nozzle of a grease-gun or oil-gun, 19, whereby lubricant can be forced through the cas-, ing, 12, into the flange chamber, 6, in the valve cas'e, 1. v

The ball valve 14, yields inwardly under the plressure of the lubricant being mjected by t e grease gun, and is restoredto its seat by the spring, 17, when the injecting pressure. is diSCOlltlIillGd;

I am thus able, when it is desirable, to fill the flange chamber, 6, with lubricant under pressure, which lubricant tends to follow along the valve-stem, 4, from the flange chamber into the stufling box, 7, to lubricate the acking, 8,therein.

v e valve stem can thus be maintained in a freely rotatable condition, and leakage due to hardeninugnand shrinkage of the packin in the st g box prevented.

e lubricator may have a removable dustca on its outer end if desired.

at I claim as new and desire to secure by Letters Patent is:

In combination, a valvecasin having a chamber in one end and apertu' to receive a' valve stem, a cap mounted on said casing 105 and havin an apertured skirt rejecting into said amber, a box ormed in said cap, a packing in sai stufling box, a

' gland for said packing, a rotary valve stem being enlarged whereby the lubricantupo' projecting through said stufling. box and. being forced therein will seep up to th apertures, and having a peripheral flange packing to lubricate the same. positioned in said chamber and confined be- In testimony Whereof,-I have hereunto se 5 tween the casing and said skirt, a forced my hand this 8th day of February 1927.

feed lubricator communicating with said chamber below said packing, said chamber JOSEPH BROOKS. 

